Extreme nonlinear strong-field photoemission from carbon nanotubes

被引：25
作者：
Li, Chi [1 ,2 ]
Chen, Ke [1 ,2 ]
Guan, Mengxue [3 ,4 ]
Wang, Xiaowei [5 ]
Zhou, Xu [6 ]
Zhai, Feng [7 ]
Dai, Jiayu [5 ]
Li, Zhenjun [1 ,2 ]
Sun, Zhipei [8 ,9 ]
Meng, Sheng [3 ,4 ]
Liu, Kaihui [6 ]
Dai, Qing [1 ,2 ]
机构：
[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, Div Nanophoton, CAS Key Lab Standardizat & Measurement Nanotechno, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
[3] Chinese Acad Sci, Beijing Natl Lab Condensed Matter Phys, Beijing 100190, Peoples R China
[4] Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
[5] Natl Univ Def Technol, Dept Phys, Changsha 410073, Hunan, Peoples R China
[6] Peking Univ, Acad Adv Interdisciplinary Studies, Collaborat Innovat Ctr Quantum Matter, Sch Phys, Beijing 100871, Peoples R China
[7] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Zhejiang, Peoples R China
[8] Aalto Univ, Dept Elect & Nanoengn, Tietotie 3, FI-02150 Espoo, Finland
[9] Aalto Univ, QTF Ctr Excellence, Dept Appl Phys, FI-00076 Aalto, Finland
来源：
NATURE COMMUNICATIONS | 2019年 / 10卷 / 1期
基金：
国家重点研发计划; 芬兰科学院; 中国国家自然科学基金;
关键词：
DENSITY-FUNCTIONAL THEORY; ATTOSECOND METROLOGY; ULTRAFAST; PHASE; TIME; EMISSION; PULSES;
D O I：
10.1038/s41467-019-12797-z
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Strong-field photoemission produces attosecond (10(-18) s) electron pulses that are synchronized to the waveform of the incident light. This nonlinear photoemission lies at the heart of current attosecond technologies. Here we report a new nonlinear photoemission behaviour -the nonlinearity in strong-field regime sharply increases (approaching 40th power-law scaling), making use of sub-nanometric carbon nanotubes and 800 nm pulses. As a result, the carrier-envelope phase sensitive photoemission current shows a greatly improved modulation depth of up to 100% (with a total modulation current up to 2 nA). The calculations reveal that the behaviour is an interplay of valence band optical-field emission with charge interaction, and the nonlinear dynamics can be tunable by changing the bandgap of carbon nanotubes. The extreme nonlinear photoemission offers a new means of producing extreme temporal-spatial resolved electron pulses, and provides a new design philosophy for attosecond electronics and photonics.
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页数：9
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